* { box-sizing: border-box; }
html, body, #app { height: 100%; margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; color: #111; }
button { font: inherit; } 